Xu Ming did six tests for the black crystal substance.

Hardness, toughness, melting point, acid and alkali resistance and electrical conductivity.

Its density is 6.98 grams per cubic centimeter, slightly smaller than iron, but its hardness is extremely high. No substance can leave scratches on its surface. Even if you find diamonds with the highest hardness of Mohs reaching 10, it will rub wildly on its surface, and the diamond will wear severely, and the black crystals will not be damaged.

This is a brand new substance with a harder harder than all objects in Blue Star!

But ordinary substances with high hardness have not very toughness. It is like a stone that is very hard, but it will be broken if it is smashed hard. The hardness of glass is high, but it is also easy to break... This is the reason why the ancients said that it is easy to fold just over.

However, the toughness of the black crystal is not bad.

Xu Ming deliberately cut a black crystal strip of arc-shaped arch bridge, which was less than 2mm thick, then put it on the stone, picked up the hammer and smashed it hard!

But after hitting hundreds of hammers, they were safe and sound.

Xu Ming could only bring a piece of marble weighing hundreds of kilograms, lift it over his head, and then smash it hard! He wanted to end it completely!

However, after moving the stone away, the black crystal strips did deform, but they did not break.

Resilience beyond imagination.

"On the Blue Star, there is a new nanomaterial called graphene, which has extremely high hardness and can ensure toughness... This black crystal is comparable to graphene."

In addition, it is acid resistant, alkali resistant, not easy to corrosion, and has no electrical conductivity. It can be concluded that it should be non-metal.

And on the test of melting point, Xu Ming's chin really fell off.

It has a very high melting point!

A kerosene blowtorch flame with a temperature of more than one thousand degrees cannot have any effect on its surface.

Placed in the center of the carbon stack with the highest temperature close to 3,000 degrees, there are only signs of slight redness on the surface of the black crystal.

Xu Ming himself used crystal materials to create a concave light concentration device with a surface area of ​​2 square meters, which can focus 2 square meters of sunlight on a point the size of a sesame grain.

With long exposure, this focal point can generate high temperatures close to 6000 degrees.

Even so, at noon, Xu Ming, who was holding the temperature meter in his hand, detected a high temperature of 5863.8 degrees. The black crystal substance near the light spot was only red and did not melt.

"The high temperature that can turn rocks into magma can't do anything to it?"

"It's close to 6,000 degrees. The temperature on the surface of the sun on the Blue Star is like this. Is it impossible to melt the black crystal?"

"this……"

Xu Ming was shocked for several minutes.

After calming down.

As a military enthusiast, Xu Ming immediately realized that the most suitable use of black crystal is where.

Aircraft engine!

You can use it to make the working blades of the turbofan engine.

"The Xia Kingdom on Blue Star has become more and more developed in recent years, but there are still many shortcomings in the military field, especially military engines, which are a shortcoming that has not been made up. We have even developed the most advanced fifth-generation fighter jets, but we are still waiting for advanced performance and reliable quality engines, and have been repeatedly released, dragged down year after year, seriously delaying the formation of combat effectiveness of advanced equipment."

"Sometimes it even makes military enthusiasts wonder whether the guys who developed the engine are all mediocre people? They are all people with a good meal? It's hard to handle just one engine for decades. What exactly do you do for?"
Chapter completed!